The future of 1/12 scale
#931
Tech Master
iTrader: (1)
A interesting comparison was a pair of batteries in my USGT car. Same motor and gearing. After a 6 minute qualifier the 65c/4600 mah shorty was 7.7v the full size 65c/7600 mah was 8.0. And as expected faster fast lap and much faster at the end of the run.
But a mute point as I haven't seen 2 cell 1/12 scale ever. I was at races where 6 cell was run but as speeds increased that went away.
#932
Tech Adept
We're in the middle of a big debate about spec 1/12 tires in the UK right now. There are obviously many pros and cons to the idea and there is a real divide among existing racers. Lots of them are very stand-offish about the whole concept of it, whilst others keep an open mind and consider the potential merits.
Someone mentioned rubber 1/12 tires in Japan - have they got a link to where I could see/buy some please?
#933
Tech Champion
iTrader: (34)
Do you think that if a stock class was offered with a spec tire then it would encourage more people to consider having a go?
We're in the middle of a big debate about spec 1/12 tires in the UK right now. There are obviously many pros and cons to the idea and there is a real divide among existing racers. Lots of them are very stand-offish about the whole concept of it, whilst others keep an open mind and consider the potential merits.
Someone mentioned rubber 1/12 tires in Japan - have they got a link to where I could see/buy some please?
We're in the middle of a big debate about spec 1/12 tires in the UK right now. There are obviously many pros and cons to the idea and there is a real divide among existing racers. Lots of them are very stand-offish about the whole concept of it, whilst others keep an open mind and consider the potential merits.
Someone mentioned rubber 1/12 tires in Japan - have they got a link to where I could see/buy some please?
Foam tire hot topics among the non-12th crowd
Truing
Changing ride height
roll out
Does a spec foam solve this ?
Also for most tracks, there is already a spec-ish setup
Black/Yellow
Offered to test spec 12 tires, but have yet to see any
For GT300 info
Check your pm's
#934
Tech Champion
That was the problem way back when people were considering doing 2s with a 380 motor. The concept was good, but the only sensored 380 motors were made by Novak, and the winds available were WAY too much power for the average driver.
FYI, some rules of thumb are:
Power increases as the square of voltage. (Doubling the voltage gives four times the power, all else being equal.)
Power increases as the inverse square of motor turns. (Halving the number of turns gives four times the power, all else being equal.)
FYI, some rules of thumb are:
Power increases as the square of voltage. (Doubling the voltage gives four times the power, all else being equal.)
Power increases as the inverse square of motor turns. (Halving the number of turns gives four times the power, all else being equal.)
3.5T: 620W
4.5T: 530W
5.5T: 420W
6.5T: 390W
7.5T: 340W
8.5T: 280W
10.5T: 235W
13.5T: 195W
17.5T: 130W
21.5W: 85W
NOVAK BRUSHLESS MOTOR SPEC CHART
#935
Tech Master
iTrader: (5)
Hi Mark
Foam tire hot topics among the non-12th crowd
Truing
Changing ride height
roll out
Does a spec foam solve this ?
Also for most tracks, there is already a spec-ish setup
Black/Yellow
Offered to test spec 12 tires, but have yet to see any
For GT300 info
Check your pm's
Foam tire hot topics among the non-12th crowd
Truing
Changing ride height
roll out
Does a spec foam solve this ?
Also for most tracks, there is already a spec-ish setup
Black/Yellow
Offered to test spec 12 tires, but have yet to see any
For GT300 info
Check your pm's
#936
what chassis is that?
#937
Tech Champion
iTrader: (34)
They are Yokomo R12GT300 cars
Been around since 2011
http://www.teamyokomo.com/gt/lineup.html
Been around since 2011
http://www.teamyokomo.com/gt/lineup.html
+ YouTube Video | |
#938
Tech Elite
iTrader: (8)
I totally forgot about the GT300!
I actually had the chance to drive one of these GT300's around my local track. It was running a 21.5 motor or faster (13.5) 2 cell with kit or Kawada rubber tires, I forget. Surprisingly, it hooked up really well on prepared asphalt and I would imagine they would work just as we'll on carpet.
I'll try to see if one of the guys can bring one tomorrow and drive it around the track.
I actually had the chance to drive one of these GT300's around my local track. It was running a 21.5 motor or faster (13.5) 2 cell with kit or Kawada rubber tires, I forget. Surprisingly, it hooked up really well on prepared asphalt and I would imagine they would work just as we'll on carpet.
I'll try to see if one of the guys can bring one tomorrow and drive it around the track.
#939
that would be a hit here
*good thing I can't read Japanese
*good thing I can't read Japanese
#941
Tech Regular
iTrader: (2)
Desert rat you bring up a good point, why is 1/12th so small compared to 1/10 tc when it has so many advantages? i am not sure but i do know when i was considering which to get over a year ago all the LHS' told me to go 1/10, in hindsight this is probably because they can make more money out of 1/10.
all less experienced or novice probably believe it is too hard and because 1/12 is rarely seen and needs more delicate conditions to operate most people are wrongly scared off. also i believe the 2wd vs 4wd factor plays a part too for newbie and intermediate, maybe im wrong but all i know is that i live in a city of nearly 5 million people and there is only 1 regularly run 1/12th class vs several 1/10 tc classes.
cheers
oldenuff
p.s them rubber tyred 1/12ths are definitely beyond cool
all less experienced or novice probably believe it is too hard and because 1/12 is rarely seen and needs more delicate conditions to operate most people are wrongly scared off. also i believe the 2wd vs 4wd factor plays a part too for newbie and intermediate, maybe im wrong but all i know is that i live in a city of nearly 5 million people and there is only 1 regularly run 1/12th class vs several 1/10 tc classes.
cheers
oldenuff
p.s them rubber tyred 1/12ths are definitely beyond cool
#942
#943
Tech Champion
#944
Tech Elite
iTrader: (37)
The Novak motor spec chart suggests an overall relationship much closer to a doubling of power when halving the number of turns. With some variation through the range and with specific pairs of course.
3.5T: 620W
4.5T: 530W
5.5T: 420W
6.5T: 390W
7.5T: 340W
8.5T: 280W
10.5T: 235W
13.5T: 195W
17.5T: 130W
21.5W: 85W
NOVAK BRUSHLESS MOTOR SPEC CHART
3.5T: 620W
4.5T: 530W
5.5T: 420W
6.5T: 390W
7.5T: 340W
8.5T: 280W
10.5T: 235W
13.5T: 195W
17.5T: 130W
21.5W: 85W
NOVAK BRUSHLESS MOTOR SPEC CHART
The Novak numbers indicate a factor of 2.76 difference in power between 21.5T and 10.5T motors, but only a factor of 1.79 between 10.5T and 5.5T motors. One could probably come up with a pretty good estimate of the internal resistance of the battery they used if the motor resistances were known.